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Poly(isosorbide carbonate): A ‘green’ char forming agent in polybutylene succinate intumescent formulation

Abstract : A new flame retardant (FR) intumescent system for polybutylene succinate (PBS) was developed using poly(isosorbide carbonate) (PIC), a bio-based polymer, as a ‘green’ char forming agent. The use of this charring agent in PBS/ammonium polyphosphate (APP) permits to obtain better efficiency than PBS/APP alone for mass loss cone calorimetry (MLC) test: pHRR was decreased by 24% vs 19%, THR was decreased by 48% vs 25% and the yield of residue was increased to 44% vs 23% respectively. According to the temperature measured by thermocouples embedded in the sample, the char formed for PBS/PIC/APP showed a better heat barrier effect than that of PBS/APP: under the char, the temperature and the heating rate of PBS/PIC/APP is significantly lower than those of PBS/APP. Obvious differences of the chemical composition and the morphology of the chars highlight that the good results obtained for PBS/PIC/APP were governed by a glass type char formed during the MLC test.
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Soumis le : lundi 16 mars 2020 - 10:16:49
Dernière modification le : mardi 19 octobre 2021 - 22:57:00


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Chi Hu, Serge Bourbigot, Thierry Delaunay, Marion Collinet, Sophie Marcille, et al.. Poly(isosorbide carbonate): A ‘green’ char forming agent in polybutylene succinate intumescent formulation. Composites Part B: Engineering, Elsevier, 2019, Composites Part B: Engineering, 184, pp.107675. ⟨10.1016/j.compositesb.2019.107675⟩. ⟨hal-02508857⟩



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